在MoTe2的热传输中,声子散射和界面合的相互作用
Haibo Ke1, Jinghuan Xian1, Ruixue Zhou1
1College of Physical Science and Technology, Xiamen University, Xiamen, 361005, China.
Small (Weinheim an der Bergstrasse, Germany)
|November 20, 2025
概括
测量了二甲 (MoTe2) 导热率,揭示了内在值和显著的基质效应. 基板工程为电子产品的2D材料提供了一条调整热传输的途径.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术纳米技术
背景情况:
- 热管理对于高功率电子产品至关重要.
- 二维 (2D) 材料具有独特的热性能.
- 二甲化物 (MoTe2),一种过渡金属二甲基化物 (TMDC),对电子产品有希望,但对其热传输的了解很少.
研究的目的:
- 研究MoTe2.2的内在导热性.
- 检查基板如何调节MoTe2.2中的热传输.
- 了解厚度依赖的热行为和基板合效应.
主要方法:
- 无接触光热拉曼光谱法.
- 高分辨率扫描热显微镜.
- 测量悬浮和基板支的MoTe2 (单层,双层).
主要成果:
- 内在导热率:23.3 ± 1.5 W m−1 K−1 (单层),17.5 ± 1.8 W m−1 K−1 (双层) 的.
- 基质影响:单层MoTe2在h-BN上 (11.6 ± 0.2 W m-1 K-1),在SiO2/Si上 (≈7.4 ± 0.2 W m-1 K-1).
- 在支持的MoTe2.2中观察到非单调的厚度依赖.
结论:
- 基质的选择显著影响MoTe2的导热性.
- 确定了有效的基板合的关键厚度.
- 在MoTe2中的热传输可以通过基板工程进行调整,为电子热管理提供了洞察力.
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